Chess King Pro with Houdini 2 Pro This old version has been discontinued, new 2015 versions also on Amazon CHECK THE NEW AND IMPROVED 2015 CHESS KING GOLD (also Amazon) Analyze your chess games with Houdini 2 Pro, Includes 5 million game GigaKing Database Prepare for your opponent, opening and custom trees, 1500 puzzles and 100+ quest games included in package, classical and random playing modes Pro version uses up to 32 cores for Houdini 2 Pro, compatible with Chess960